Improvement in spark-arresters



W. RUsHToN. SPARK-1tRRFEJSTER..V

' Patented Sept. 25.1875.

WILLIAM RUsHroN, or ATLANTA, GEORGIA.

,IMPROVEMENT IN SPARKARRESTERS.

Specification forming part of Letters Patent N o. 182,713, datedSeptember 26, 1876; application filed.'

June 1, 1876.

To all whom it may concern:

` Be it known that I, WILLIAM RUsHToN, of the cityof Atlanta, Fultoncounty, State of Georgia, have `invented Improvements inLocomotive-Stacks, of which the following is the specification Theobjects of my invention are, to prevent the constant escape of sparksfrom the stacks of locomotives, but to collect and discharge them atintervals, to insure a free draft without discharging the sparks, toimpart increased durability to the stack, and. facilitate its con--nection to the boiler; and these objects I attain by the arrangementand construction illustrated in the accompanying drawing, in Which-Figure l is a sectional elevation of a locomotive boiler and stackshowing my improvements; and Figs. 2 and 3, detached plan views.

To the boiler A is bolted a saddle, B, having' a dan ge, a, adapted tothe boiler, and an upper iiange, af, to ears of which is bolted a ring,B', having two concentric upright flan ges, c c', the outer iiaring caseC of the stack being bolted to the flange o, and the inner cylindricalpipe D being bolted to the ange c. Upon the ring B' is cast a hollowenlargement, d, which projects through an opening in the saddle B, andwith this enlargement communicates a pipe, E. In the side of theenlargement is an opening, a', directly opposite which, and cast withand projecting from the ring B', is a short pipe, F, level with thebottom of the stack, and serving to support the case of a sliding,rotating, or other valve or damper, e, operated by a rod leading to thecab ofthe engine. The tube E leads to a three way cock, G, from whichextends a pipe, El, communicating with the boiler at any desired point,and a pipe, E2, communicating with the usual blowpipe s in thecombustion-chamber. At the edge of the opening in the usual inclined topH is a plain imperforate curtain or flange, I. Extending downward andwithin the stack is as independent lining, J, consisting of a caststeelplate extending below the top of the pipe D, bent or otherwise formed tocoliform to the caseA, and to form an inwardly-inclined Ilan ge, f,adapted to the inclined top H, as shown. Above the uptake is an invertedconel or funnel,

lower face, and provided with recesses or sockets i to receive the upperends of' V-shaped,

,grooved, or hollow guards, L, consisting of chilled iron, resting on orin sockets in the flange or plate m at the upper edge of the pipe D, andcovering the bolts n, which secure the funnel in its position. Y

The sparks carried upward by the exhaust, striking the smooth inclinedsurfaces of the funnel, are deflected outward without being materiallybroken, and thrown against the liner J, which prevents the wearingeither of the outer case A or the top H. This is an iniportant featureof my invention, as liability to Wear away at the point of junction ofthe side and top of the case has heretofore been a serious objection tothis. form of stack.

When the sparks have accumulated in the receptacle X, the engineer opensthe valve e, and, turning the cock G, discharges the jet of steam orwater, or both, through the opening or nozzle x through the mass ofsparks in front of the same, and through the pipe F, forcibly expellingthe sparks, which continue to fallin front of the nozzle until all aredischarged.

It will be apparent that by so arranging the nozzle and the pipe F thatthe sparks must fall between the two, their forcible expulsion issecured, While the valve e serves to retain 'them until a considerablequantity has accumulated, thereby avoiding the constant disdischarge,which is as objectionable from one part of the side of the stack as fromthe top.

By substituting a three-way cock, G, for the cock usually employed withthe pipe E, the steam is admitted to the nozzle w without the use of anyexpensive appliances, and without any material additions to the devicesordinarily in use. By forming the cone K of chilled metal with a smoothsurface, it is rendered much more durable than it would be if ofmalleable iron and roughened as usual, for I have found that theexistence of any shoulder or projection for the sparks to strike againstmaterially diminishes the durability ofthe parts. The guards L serve tosupport the funnel, and further protect the bolts n, which wouldotherwise be rapidly cut away, the'sides of the Q ISQJLS guards orstandards being on, an angle to each other, thus deiecting the sparksand reducing -'the abrading action.

Itv will be seen that the stack is secured to the ring B', which issimply bolted tot-he saddle B, thus permitting the removal of the stackWithout disturbing the` connection with the boiler, the pipe or hollowenlargement F cast with the ring supporting and facilitating theattachment of the. valve appliances, and the hollow enlargement daffording a connection for the pipe E that is not interfered with by theremoval ot' the stack.

As before stated, the pipe connecting the nozzle w and the boiler maycommunicate with the latter at any point, so as to discharge either drysteam, or steam and Water, or Water alone, thus serving as asurface-cock, and to conduct the water to a position to quench and expelthe sparks.

Without conningmyself to the precise arrangement of parts shown anddescribed, and without claiming the liner J, which will form the subjectof another application,

I claim- 1. The combination, in a locomotive-stack,

serving to conduct the steam or water to the g nozzle x, as set forth.

3. rIhe combination of the nozzle e, pipes E -E1 E2, and three-WaycoclLG, as and for the purpose set forth.

4. The guards L, having inclined sides, for the purpose specied.

5. The combination of the guards orsupports L, and funnel K, havingsockets i to receive the upper ends of saidsupports, as specified.

In testimony whereof' I have signed my name to this specication in thepresence of two subscribing Witnesses.

W. RUSHTGN.

Witnesses: p

CHARLES E. FOSTER, J. W. HAMILTON JOHNSON.

